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Subtract two variables in Bash
...
You just need a little extra whitespace around the minus sign, and backticks:
COUNT=`expr $FIRSTV - $SECONDV`
Be aware of the exit status:
The exit status is 0 if EXPRESSION is neither null nor 0, 1 if EXPRESSION is null or 0.
Keep this in mind when using the expression in a bash sc...
Xcode source automatic formatting
...y described how to auto-indent. That's not what "format" (with white space and new-line addition and removal and such things) really means.
– dergab
Apr 17 '15 at 12:40
5
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Passing a String by Reference in Java?
...g(StringBuilder zText) { zText.append ("foo"); }
Create a container class and pass an instance of the container to your method:
public class Container { public String data; }
void fillString(Container c) { c.data += "foo"; }
Create an array:
new String[] zText = new String[1];
zText[0] = "";
vo...
Preferred Java way to ping an HTTP URL for availability
...ve to somehow close the connection?
No, you don't explicitly need. It's handled and pooled under the hoods.
I suppose this is a GET request. Is there a way to send HEAD instead?
You can cast the obtained URLConnection to HttpURLConnection and then use setRequestMethod() to set the request ...
Soft wrap at 80 characters in Vim in window of arbitrary width
...t a large minimum width for the line numbers column via :set numberwidth=6 and
then you could resize your window with :set columns=86 (or with the mouse) to the proper size.
If you edit a file with a million lines in it, you may have trouble, but that's unlikely. You're wasting 6 columns of sc...
.NET WPF Remember window size between sessions
...ifferent type or structure will be needed.
Initialise the first two to 0 and the second two to the default size of your application, and the last one to false.
Create a Window_OnSourceInitialized event handler and add the following:
this.Top = Properties.Settings.Default.Top;
this.Left = Propert...
iOS: UIButton resize according to text length
In interface builder, holding Command + = will resize a button to fit its text. I was wondering if this was possible to do programmatically before the button was added to the view.
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Eclipse: Files opened by multiple searches using same editor tab
...I then use the "file search" function again to find some other bit of text and this time double click on the file "B.java", this file will replace "A.java" in the editor.
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How do I escape ampersands in XML so they are rendered as entities in HTML?
...ML text that I wish to render in an HTML page. This text contains an ampersand, which I want to render in its entity representation: & .
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Android LinearLayout Gradient Background
....xml:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="50dip"
android:orientation="horizontal"
android:background="@drawable/main_header_selector">
&l...